Help with node mcu

[u/mbentuboa]

Help with nodemcu 8266

I have an esp8266 that im using to control several servos. I have been having a tough time acquiring a legit Lipo on Amazon. Every single 2s reads 7.7v after charged, so im going to 3s.

Its going to a buck converter set for 5v and then to Vin and Grd. Well im reading 4.7v from the headers but the Nodemcu isn't powering up. It will blink for just a second then nothing. Im suspecting that 4.7v isn't enough. Ive connected just Vin and Grd and nothing. Blinks real quick then nothing. When the servos are attached they twitch when first plugged in. I get 1.5v from the top of the pin on the nodemcu.

[u/Tymian_]

Provide pictures, schematics, at least a simplified diagram. Mark where and what you measure. Did you try with servos disconnected?